Liquid-fuel burner



A. Nlt LOCKETT.

LIQUID FUEL B,URNER.

APPLlcATxoN FILED JUNE 1o. 1920.

Patented Oct. 17, 1922.

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`Patented Get. 17, 1922.

UNITED ,STATES PATENT OFFICE.

ANDREW M. LOCKET'I, 0F NEW ORLEANS, LOUISIANA, ,ASSIGNOR '110 A. M.LOCKETI & C0. LTD., 0F NEW ORLEANS, LOUISIANA, A. CORPORATION OFLOUISIANA.

LIQUID-FUEL BURNER.

l.eippiicatnm inea :une 1o, 1920.' serial No. 387,940.

To all ywhom t mag/vpcoacerfn: l y p Be it known that I, ANDREW M.Locnn'rr, a citizen of the United States, residing at State ofLouisiana,have invented certain new and useful Improvements in Liquid-Fuel Burners, of which the following is a specification.

My invention relates to liquid fluid burners and more particularly tofuel oil burners or atomizers which consist of an oil pipe and a steampipe entering any form of burner tip in which the steam and oil emergefrom the burner in separate openings or slots arranged one above theother.`

The objects of the invention are to be so construct and arrange theburner, oil and steam supply pipe with respect to each other and saidburner, with a pressure or spring controlled check valve, so that whenthe oil supply is cut off from the burner, the oil remaining within theburner and other parts subjected to the heat of the furnace isautomatically and entirely blown out or discharged from said burner andcooperating heated parts, thereby preventing the earbonization of oil inthe burner or its parts, and interfering with the continuous or renewedoperation of the burner or proper shape of flame formed by the burnertip when the oil and steam are again supplied and the burner put inservice.

,Another and most important object of the invention is to make a fueloil burner entirely safe and free from'any possibility of vandavoid theearboniaation of oil in the -burnerslthere was provlded and arranged aflare back which usually occurs with burners as now constructed andarranged and due to the large volume of oil entrapped in the long pipeconnection between the cut off valve and burner tip being suddenly blowninto the highly heated furnace after the oil is shut offi and the steamis rapidly and. manually diverted'into the burner and its oi l. pipeconnections'by the fireman.

- Other objects .and advantages ofthe invention will appear from thev"detailed description of the .construction and manner'of assemblingyand operation which willV be presently given.

The invention consists of structural characteristics and relative arranements of elements which will be hereinaer more fully described andparticularly pointed out in the appended Claims. l

out and repeatedly demonstrated, sooner or later and in the bestregulated in- In the' drawings, in which similar reference charactersindicate the parts 1n the sevy 'eral figures, New Orleans, in the parishof Orleans and y lFigure l, is a side elevation partly in sectioi of theimproved burner arrangements; `an

lFigure 2, an enlarged-and sectional view of the valve used inconnection with oil and steam supply pipes.

In the use of liquid fuel for furnaces the burner is usually projectedslightly into the fire `chamber of the furnace, and were it not for thecooling effect of the steamy and oil entering said burner, it wouldbecome highly heated bythe high temperatures generated land existing inthe fire chamber'. When the oil is shut off and the llame of theburneris extinguished, although there may @be no other burners in use in thefurnace, the heat radiating from the highly heated fire bricl would besuflicient to carbonize any oil remaining in the burner, therebylcausing the particles of carbonto partially or completely close up theburneror connecting sections of pipe whichwould interfere with theproper How of oilto the burner or efIin ycient shape of ame produced bythe tip of the burner when the oilv is againturned on ifurnacey put inservice. The foregoing conditions and bad results would be more likely'to occur, if in the case of a furnace operating several burners, one ofwhich be temporarily shut down by reason of reduced steam consumption orheating requirements.

. Previous to my invention to take care of steam'connection with the oilpipe, so that immediately aftershutting downr the burner by eutting'offthe oil supply, the reman by manual operation, and it has been foundthat dustrial plants, the fireman will fail to make use of the aboveindicated steam connection,

resulting in trouble with the burner as described. To overcome all theobjections and 4failures herein pointed out, and remove the necessity ofa separate operation and all rcsponsibility of the fireman to blow steamthrough the oil pipes, this invention was devsed.

, are the liquid fuel or oil supply pipe and pressure or steam supplypipe 16, which may be surrounded by the centering casing 17 suitablysupported therein and carried by the eenteriiig'castings 18. 19 is apipe yconnected with a suitable liquid fuel or oil supply under pressureand provided with a valve 20 foncutting off said fuel supply whendesired. Between said valve 2O and oil supply is preferably interposed acombinedstrainer and regulating valve 21, controlled by hand wheel 22,as shown for example in U. S. Patent No. 1,206,5544 to Bernard' S.Nelson and dated Nov, 28, 1916, and while it is contemplated using sucha strainer it is not absolutely essential in carrying out the presentinvention.

A pipe 23 connected to any suitable supply of pressure as steam is incommunication with the steam supply pipe 16., and is provided with theusual cut ofi? valves 24: and 25 controlled by hand wheels 26 and 27,respectively, and interposed between' said valves 24k and 25` is astrainer 28., and by closing said valves 24 and 25,l the strainer 2S canbe readily removed, inspected, cleaned or repaired without disturbingthe other parts of the burner.

29 is a branch. pipe connecting the interior of the oil supply pipev 15.with the source of steam supply, and while I have shown and preferablyuse the branch pipe 29 in connection with the strainer 28 and valve 24,such an arrangement is not essential and could be varied or modiedwithout in any Way departing from the broad application of the presentinvention. A pressure actuated or spring controlled check valve 30 isprovided in said branch pipe 29, and as shown in Fig. 2 consists oill avvalve disk 31 cooperating with and normally held to itsv seat by meansof a coil spring 33, sur-- rounding a valve 'spindle 34; 'and interposedbetween a disk 35, fixed to the spindle 34.- and a dish capable ofmovement along said spindle by properly turning` the screw plug 37' whencap 38 is removed, as will be readily understood and needs no furtherdisclosure, and while l have shown this as my preferred form Aofpressure actuated valve, any other form of this type of valve may bereadilysubstituted without in any way changing the essential featuresand operation of lthe presentinvention.

of the spring 38. and pressure of the oil within the pipe 29 whilepassing through strainer 21 to the oil supply pipe 15. Should it bedesired to extinguish the burner, the valve 2O is closed therebycutting; oil' all supply of oil to the strainer."

21|., sugply pipe 15 and burner tip 10, and when this is done, thepressure within the strainer 21 and its connecting branch pipe and onone side of valve dish 31 is reduced to such an extent that the steampressure within the valve 241', and the section of branch pi pe 29connected with the automatic valve 30, and on the opposite side of thevalve disk 31 will be such as to. automatically lift said disk 31 olfits seat 32 and `gradually allow the steam to pass through said valve30, branch pipe 29, through strainer 21 into oil supply pipe 15, and outof slot 11 of the tip 10, and in so doing thoroughly and automaticallyblow out slowly all liquid fuel or oil remaining in said oil pipe 15 andentrapped in said pipe 15 und strainer 21 between. the cut off valve 20.and burner tip. 10, and prevent any possibility of clogging up orfouling of the burner tip or oil pipe connection therewith, due tocarbonization of the oil as is usual in fuel oil burners where throughneglect or forgetfulness the burner not blown out after the fuel hasbeen out oil.

From the foregoing disclosure of the construction and operation of theinvention, it will be seen that the objects and advantages of thepresent arrangement pointed out in the statement ofv invention 'arefully and efficiently carried out, and that there has been devised aburner which is not only guaranteed to operate contiiuiouslyand with.

uniform heating.; Capacity, but at the Same time is absolutely safe andfool proof in its operation. lt will also he understood that manychanges and modifications will. readily suggest themselves to. any onewithout departing from the essential features and spirit of the presentinvention, and therefore wish it to be distinctly understood that I donot limit myself lto the specific arrangement and construction hereinshown and d escribed. What I' claim is :--V v 1. A liquid vfuel burnercomprising a burner tip, a liquid fuel supply pipe connecting said tipwith a fuel supply, means for cutting olf the fuel supply into saidsupply pipe and to the burner tip, a branch pipe leading from a sourceof pressure into fuel supply pipe, means separate and independent of theburner tip in said branch pipe and so constructed and arranged toautomatically open and close communication between said source ofpressure and fuel, supply pipe respectively by the cutting olf and inthe fuel supply tosaid fuel supply pipe, whereby any fuel remaining insaid fuel supply pipe and burner tip after the fuel supply is cut olifis automatically blown out to prevent carbonization of fuel and ioulingof the burner.

A' liquid fuel. burner comprising a burner tip, a liquid fuel supplypipe connecting said tip with a fue] supply, a valve for cutting off thefuel supply into said supply pipe and to the burner tip, a pipe leadingfrom a source of pressure to the burner tip for atomizing the fuel, abranch pipe connecting said source of pressure with said fuel supplypipe at a point intermediate the burner tip and valve for cutting olfthe fuel supply, and a separate and independent pressure controlledvalve in said branch pipe adapted to be reacted upon by the pressurewithin the fuel supply pipe and so constructed and arranged toautomatically open and close communication between said source of pressure and fuel supply pipe respectively by the closing and opening of thevalve cutting off the fuel supply.

3. A liquid fuel burner comprising a burner tip, a liquid fuel supplypipe connecting said tip with a fuel supply, a valve for cutting olf thefuel supply into said supply pipe and to the burner tip a pipe leadingfrom a source of steam pressure to the burner tip for atomizing thefuel, a branch pipe connecting said source of steam pressure with. saidfuel supply pipe, and a valve independent of the burner tip in saidbranch pipe normally closing communication between the fuel supply pipeand source of steam pressure when the valve for cutting olf the fuelsupply is open and automatically open communication through said branchpipe between said fuel supply pipe and source of steam pressure throughthe burner tip when valve controlling fuel supply? is closed.

4L. A liquid fuel burner comprising a burner tip, a liquid fuel supplypipe connecting said tip with a fuel supply, a valve for cutting` olfythe fuel supply into said supply pipe` and to the burner tipi, a pipeleading from a source of steam pressure to the burner tip for atomizingthe fuel, a branch pipe connecting said source of steam pressure withsaid fuel supply pipe at a point intermediate the burner tip and valvefor cutting off the fuely supply, and a valve in said branch pipeWithout the burner tip and reacted upon and held to its seat by thepressure within fuel supply pipe and normally closing communicationbetween the fuel supply pipe and source of steam pressure when the valvefor cutting off the fuel supply is open and automatically openscommunication through said branch pipe between said fuel supply pipe andsource of steam pressure when valve controlling fuel supply is closed.

In testimony whereof I aix my signature.

ANDREW M. LOCKETT.

